settling pit

例句：

1. 1. The company has been working on a project to improve the quality of its products.
   该公司一直在努力提高产品的质量。
2. 2.The settlement pit was filled with water and mud after the earthquake.
   地震后，沉降坑被水和泥填满了。
3. 3. The engineer carefully studied the data from the settlement pit to determine the cause of the problem.
   工程师仔细研究了沉降坑的数据，以确定问题的原因。